Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcc20c8c22313665d479a4d0ebb701cbab2bb46c5fcae1d1b1d67d7a576b4100' 
  AND token = 'cWA8EPydwhjfg5TFGGVBfX22bYx1E+063lCW78Ihjtg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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