Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8002f7e67f03411043040d94af70da277b7da213b00abe48979da4b35d4387c9' 
  AND token = 'P/xi/ckf5IQ2yFO6ivEtNiV/7ddiE3FgNqcSztOZDWU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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