Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc958082d3a004ac576389ed473d4d0cce17d4f7383968aaad829971024835f4' 
  AND token = 'TSG95N7xqTZTWowemNGNdTy8RUo5MzdcMP0SxcomTWA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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