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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69134904ced7c66ae231966c4d9a8abb50ab549323956aeea03f32524b8595ad' 
  AND token = 'dFrGuvp59EPB7JaBoks/6AOxLXxsP3kOj7lMeQ5A2j0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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