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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f77b7e7d02212715a64e4f915d3454d5627db4f52b8a13cc44e0216f8733c665' 
  AND token = '2oC3hibNuPzhCogdL8wlDAKkyLxt5RU2fev0QP9c/vU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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