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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '9063d0228f4752999bd0facc1fb38ca38d37e361f88b9619428e6d378c2789cd' 
  AND token = 'WGt37T2OcWua46Nt8vt9yzjugMR2p7zbpGoGQZetYBs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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