Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9fbe0cf3e930bbdf4824c33170042c434e198c77165a8682292b2eaef8d2027' 
  AND token = 'kLdYTCnRvdefonTmAgwr8dBglelpHDYABH/mzT2qm+Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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