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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '172d45f663e9a323d009eccf5ba03b3837c509a769925b0c3b902a24c4a074e6' 
  AND token = 'tNTH46hpOc4KvxesZtLtEnvAMNy9q57rGJ941uWdEkg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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