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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '007adb9fbb8f8dbd2589c047713ece1149d95123f290a3c3d9d85777a00dc1cb' 
  AND token = 'DzZtnDwIJrJwBDmhD4yNNPbiXQy12OzJTROuV0q+3xQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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