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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'ab13e67e2444c5e0bf0dfb0b78f300ffff665038d7ca6ee331a6a88e013bdd7f' 
  AND token = 'Rr9MrMbOURfeWHGzl3UR/uKK8JXkJCVlyUIDu8ccLKE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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