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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abf2962003294a7fb791edcda299d5206b8793de19241b063e94b4aa1ceccb60' 
  AND token = 'oUCaVsE0QojRF1cjupdlTIQ+aDwl41XVfwz8PVmnEM0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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