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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec9cf9cff4eb15c71f5bdae0c28f869bd03b83acb4a46b181f8c486f3ad439d7' 
  AND token = '532iODR87OFB6EhCOOGX1h0ueOVVttAisgcreOEx9gg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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