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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'c659274f120b71ddaf298119602ccee3edeee68eb59ae049c3fcbf548e0f2b84' 
  AND token = '0XCE/1A6b726CNUYu3oa3XepX09sn7h2B8Ag5LivyaY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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