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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'd8fed533340703439fcc17ba6b9740e3ea88e0110fc449578806d0a596965d74' 
  AND token = 'Xt0f1SesbvBGuNs54SujEfn/cJpDmw8LtLxt8BfoWF4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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