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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f79c445c97d85c1a157790a95cecdae64e3a3d46865c1cf751d7b8db9cc089ef' 
  AND token = 'ANBNVktWLhfK01R49fczyJIMZDMjaKH2QQgr/jDGFI0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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