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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ac5e35b45cdd72913fcb78a12bf97cb2d1303c30c75971431801c1511c7550e7' 
  AND token = 'bAMv9jfZO7vGsU5uholwEGfwtTpMCWvnHtzCRl+79q8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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