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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '4b7eca310cbc29ecf2c31df7e0113da7b90066ac87ce7f7bb65e6f13c5d371b6' 
  AND token = '+Sdu2dLvfB19rXQyKCelDNgfrkcx1VcMwHUvw+B4G/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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