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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0413737fe88eeee2ef241afc8115e5011be83eee42e07bb8bffc5a8c1ce90d74' 
  AND token = 'RV039AziHvmM8Mb5x23go/6/zXO8SC9uASQf3xF3Mu0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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