Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '607c520fb23b3c5caa3ea27ec9e02bdd48764beb78cecb267097c2b0de698b9a' 
  AND token = 'RXIXdbSLn1Vr4E/npssLyrNiGJVUkootTamDv0QRsv0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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