Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13b90aad53f2c0e381de297a174a000b353b20a0b4247f2b252b3c34c5389a9c' 
  AND token = '3tjhLTIheWBI8g4LQ8mfAjp3f7tycO/MJZ4xSEvr4pI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}