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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb0f94d19e9edc7f283e323159f2caf01ea9f5b0bea78bcea23bdff818272178' 
  AND token = 'DVyC7Fhs3ReAwH7CsNlgwcbv6WgFWZjSYuuoK6xEwSY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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