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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '871e16d1e18037ce98a561c59285d055577ef0b07ae7960ef85a13208fef866f' 
  AND token = '/DT9QhrX8i8hu56EHneh44E0jFPJgVZkEHiiGcm9vvg=' 
  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"
    }
  }
}