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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca8ff9d1540e755205c7d1562c7ae3ee5f6d9ab97bf2a268847ab67be94cf912' 
  AND token = 'w1YgyyruPtchUVY1d4cU8qGgw4PEzofDxwCO4i2/510=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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