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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'f482fa5352931382cb9c8bed317bad646c1dd20b16e77c9d2c6043b9f49db030' 
  AND token = 'O4IWNrM6DzDZ6epVmULqoEluNVO9EY4C0qboGJiQgM8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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