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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'f585bb808c36fee99a1a68cc2b6e0e397614f3ec7b61ffcaa3d1d0f9c9959aac' 
  AND token = 'v5UrCNovCs7vOUplLNKR2T3b3gNmUo64/yQtE6PC6uw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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