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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '93192231574bd24319cd63cddc13f9dfcc2f46319a891f104fd1e741b7d6c812' 
  AND token = 'Twq8p2L7WAdzoTxy4CCPtZgQqJAN7OeBeevDO3eArAg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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