Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a112c764d05106d37650e4dff6b7f9657773b25c0a2633bd76707cffbdd5cdd9' 
  AND token = 'cmT8ICsqxnHCuKz83De9DHEXkq+nxdnwfagw7zzxqho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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