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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'c26edcd9c7cb7bad902e8af19e5d7b1ed85ecc0d6f6705fd8271071660002c19' 
  AND token = 'KDnpyrGTWyWY3jYItBgF7JY8ZKGFPaGeW/m6IwZgIDc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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