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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'aa8dc4f64eb2c64124232fc71e4c74ff922b7c9d18026ad1d1377dd34bdaddaa' 
  AND token = 'Nvg/W37pDx0EuxUfTnJAepee2fmkk/MkRi7mafUt5JU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}