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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd216a9e4c25415e4dfc665c566b940f3ce7c3ef834c50894fd9737d20766ca23' 
  AND token = 'IPmbaqSSnMhhirDCrVsRR2sekKb1nY8piKiACR9Ue8o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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