Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dfd360df185920a6e2cdfb7145f15a1013a8981e48bfae17f9593a87bcd0587f' 
  AND token = 'tBzULBk/AhaJmWG48o7DzkA/nsEMBblwBJULvsEFO1s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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