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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ab718de19a91402a9caab34419051cddda9c9190b1723aa311fd81c1f25103a6' 
  AND token = 'YTKrYvbZHNNCD/8iJ4AkcLlPsWqxWXxll7oXg5Q5gl4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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