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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a80409225e98e8083939bf3cbae6533673fb94162086554ac1863ef2e273d8a' 
  AND token = 'k1NtNMQ+eymyIDFOCWLYR2LvH7P2eJgROi4N0y8BG4w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00110

JSON explain

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