Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e29b2acef0e36acde77feac30fa7291c75ecd8678eb9687d037c0081c2ab93d7' 
  AND token = 'uDXAC8X+UTp0CoOE6SFRf1+RaEzOQ8gDGlfD2QKqIbw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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