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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26300c2aee252ee8f6978892baaf98125b4f85e505a0e3f55cd16fff07273fb8' 
  AND token = 'jSCd6/QKJyXIASlj3Ec68Nm8yC5ERGmWtUlHJyGqP70=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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