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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '195b96ef523c695c56ba1bfa4e09e6ec9381d89cd4258af7e7e6a42d0b8f8697' 
  AND token = 'IYbLorFz6e5cFC9n1h89McqGmCxuJKtlBFDTejkg6O4=' 
  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"
    }
  }
}