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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b5b8230feb7abce5789b15cf6fa448b5025b04726d888121db5acfe15111106' 
  AND token = 'ua8ubgjsyg13nYbllajQscwqkmJpCQ8Hz1FXQwc909A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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