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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'ddd7a0266a2708c782d483e0c4d62ac1c29f518e1e7d829a86d47bfdf5926a1b' 
  AND token = 'HfItvcYN4N0HeG8J6Vce7Rf+Kzr0BvBzwx46RR3RLrA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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