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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9782a957230d81f3240b5fd730183b9fcf01d090ee61382cef80d6be31593f7' 
  AND token = 'Rli6t/wESEokOkP6uF+ZiR0FxeZxt9wudNF10yBibzQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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