Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b4a9416f698d9dc440a7da123b45ed177d0d57e9b8207229d2e47a76f1d70986' 
  AND token = '/pmZaKFjSBXqMmMzdL1VFC/cED5yC1samKaYMjnq2/8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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