SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5bf903e3a2165c6530847f61ffb48149dc9bb57f7445c38c3ee60fc407a3065' 
  AND token = 'DjgycpCVgM/2+dlGHz6/IVjNmR+O/VXXyRK7cPSUd0Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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