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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48ccb659a658a73cdd7eeb03fe05c5e7270721c881126bf06644ef8fc34157ce' 
  AND token = 'BmK4EtFE0Mtm2R+H9MedTOEtM9NXEXt7gg/ZmCkw6Cw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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