Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc3a4ece99c8621b261ffcfff7bbf24a5166749879279cb68959a359f2775f56' 
  AND token = '82T8bff6fR6f9pOEZZk6X5yvEL9exfFWtytpn3aSwZo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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