Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c83c630f59a809a201abf27524a2a00ecbab16e41dda4d3d6d8a61996f9a8286' 
  AND token = 'nU+z0zDPVinxm1oHIR7kPqzPg/s06y1jOWUjq523QK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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