Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8da3cd220a9f58360ebff7842993419fed592858a22b95d998b92c17926cb6b4' 
  AND token = '1Pz0iPiZsEde/VYx/r1oPse3Z5D8fDaxj9XrMLSmiWI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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