SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd9f588b5cea23aa1897df9fc34c015cd25a3f5b1e7db7cd33338f687a257824b' 
  AND token = 'S/eOWiFn17Y7fSzvvWAO4o09V66x3w+JTjuXAKpKNAk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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