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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '011b9b4d6dbc55bf5e4db2c25ba26aab5252c1136c13573c50d1579adf7062d1' 
  AND token = 'n/jmrdEoEEZfVGW7v4DgLvzY57d98qpEyOmGmv2T4WM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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