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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e27b6f21bea40168bfc3673ef4069341555f645434b624147c42ec0fc6f0a47' 
  AND token = 'fpodgqWcehkR14P0HqrHsH+CKPpI/7o8t7BCFFjUQa8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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