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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '14ae3b75fe8aeb33190a7c10970f81c84a33ca1e0533ef45208032588ac61b30' 
  AND token = 'ciF7Kfv96rGtomycNt/tAV2GEvENWGqliAYhK7N6fV8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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