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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e831ac1d3c268b3dfdd4b52d0a2eeb86c0639df5d4ad290ba8c5ed85b9cf59a0' 
  AND token = 'yqpqmFgxoWa6mmSZuJztDDC+bO9DkzVL6b/R6pkv01E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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