Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '19ed025ba45fdc018a1777e8f64194c6c18d132c14426d3764fc95d68ac61c06' 
  AND token = 'W9a/3sUaS5FmkUkJ7vMORcwQD4WvePGcA49InQqR24g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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