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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2f45160efa27e5dd0e303c5942233b6ebc229bd7751fa02b2d8df92faa27d660' 
  AND token = 'OZkNDkYJu4t2XxafngvGymZ1Uyp0tAFM8TxXbzy4TJk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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