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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf99a3d1f0b027cae4f394bd999a96e359db3dc16b8fd810d9dd8fbfb37691e6' 
  AND token = 'AwYLmr1CErc/6kN2p1HQ/rXnrR14E8vjDH0AUHcWsTc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00165

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}