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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd49fd3d9e1a769dee3dba629fe47e3f649949bddbb0f00c97bc245253dcc71e' 
  AND token = 'RehiGXpJCFZin22jmj7H3ai2GN/2Lbju+1pCh2KztSI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00110

JSON explain

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