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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '081e2088cd40c24b0a1ada6981460232dfc79bce2046dae86f52c11fbaf4dc30' 
  AND token = 'UseD0Kyu/8SfVsPdk7mRPXGVEHiXHmA4JZxf/c3mkhY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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