SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b72dc159419e05f466546fffa173f899f22163b912d88fbb132bb4b515d4c1c8' 
  AND token = 'JAsP8Fjm2xQbebJTe3GL4Yq/k/zDKnHOxgFI9oeG+Hg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}