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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87b51124a2835c38a2a442228b52f978e7fe4b7ea5d20251b520577c3aa0069b' 
  AND token = 'X4iWYUeVQG2o8LrD+lhs9ddClY2+y+ZNfX/P7JgmO6Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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