Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eeb27e6624eb803cf4d0d5f678ac739ad990bae6262d6f2d35b10ff40e82e582' 
  AND token = 'MNUV6Adq3djEdEMWJy1WPo5R5nYKfGQ8ptq9KSBi4Is=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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