Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '614f1778ea4319d10e4802c329575c637c6b055206748b5f98aa91007ed4027d' 
  AND token = 'wwivplyPoYryNsoV9UOWTyMxrvdAsAnhJvhffSBB0Eg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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