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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'a11b0ac86b02aa2d666b8a0c847c9b1f8c54261689ad9a7c0af80c6dfa6660e6' 
  AND token = 'JYy3tCL8TlAzsarReDIjj6gaATnq1tekG5ODVGtZc40=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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