Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1b7a55e3e60856d6b721a84eddd0d5c66562492d6f3470bc6edc0c977d9aa8cf' 
  AND token = 'O4de9eajLLMMopbjQ8003wwtp7SN61Drxzyz82OepaM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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