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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0d1e79868e593da179e0ed2a7f3f0e46269d3077439e1e69ebd18f106d02e85' 
  AND token = 'AOZiyzkceh29NNQJhiF8TFHdrGsZk1iUD50GTfHdyjU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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