Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd09788e1c922c804129b92e0fe8ee502e7ff6497cce6298f1ed19d25a3e6d1aa' 
  AND token = 'PcgGIi79/uvN3Wi7NYiRO7D2AYmg3FDBLutIw38rIK8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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