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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db06ed9c56ed2fdc076acdfa6ebabe332c4df4c00c0713a2773fda5c45c8bbea' 
  AND token = 'ICKlxnk0pEMp57wpzdpxmobSuFisdLaxdusIV0EOArI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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