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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6f88690535e7c3fe5c8734e1a0e689b3ed54f035f27114ae027a4eb07d0a6173' 
  AND token = '+qOQaFwK4oa+dD9aOhlxuqpOV9OtEiHhe/aX/OgbOew=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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