Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7708b07a8713f6a982fc77d2972a1678fe24fa50ebaf3267d50d79b066cbc38' 
  AND token = 'dcDFEqrTYjV3MN81B0s2utdGRTOOucvLq2zdZqzTDus=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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