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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'f31c74effce0f8f2e73ecfdda44511974ba04318c88f801d9aa7ce7f3e744fd6' 
  AND token = 'yBEY9ym7S5O6EvdteUmWIGIMaTGtEMG6lOi8VpaGN5Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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