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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd98d375fd9d51c2fb0229cf355a788087f3399af7f435d46f4ad50713437a1f0' 
  AND token = '66YpEfkOcY+T55EWb7aNgzsKx7RZKVQyKi3YyUnJdu8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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