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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'cf77d6dad328a4139cfb95e01286a126164440f8cdb3bcfd32be9cd2ec19f73b' 
  AND token = 'R7KjTXDICdhu+ZCQg712sE1oxcapjN7iFUroNDCLivg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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