Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '695e187583ba1b48b1e49b9dac13f0ec62153ba498f3f3f1025dcbd65db0db91' 
  AND token = '9Fz6ih5xCbeDYtcxOAZLHBx9RI59WiZGqOGWrUrwHPA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}