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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '69851b9a35eba676ac784936c1d7b896dd90a1762f2cd1e761b1883395f8179b' 
  AND token = 'P3/zDWeJ33iJwdtYroF4HOmfF8xoU7erjaY8PfbEOSA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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