Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '678a25d480ef99d7f05667aa6976bec40f53f1941953f3d8695ed2813e33cede' 
  AND token = 'BanyuhF/AcDwcz+yZI3tmwDAMCmd7kx4eWp6vc93miU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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