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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '6eb77e96035a684fdb6a9da493c1c9dec084fcff6f53be464252ba1d09055543' 
  AND token = 'Lin5hYuYO0b24sJMWaMI0dBh6RGBZD/UQ74X70otIpo=' 
  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"
    }
  }
}