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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '2c8f9a0a21dbebff95f65ca23bab5b28b39741021a514d62b288107ae5dad98e' 
  AND token = '/VUm8/NKKumDS0tEQcgkg5o26wol5FST/6EdXXmcTZM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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